A few weeks after the augmentation procedures, Ralph, along with Daisy-023, Joseph-122, and two other Spartans, rebelled against their trainers, taking them hostage and demanding that Dr. Halsey let them leave. Halsey granted them freedom, and they escaped Reach as stowaways, hoping to return home to their parents. Soon after escaping, Ralph returned home to meet his clone that he realized was sick. He then suffered a psychological break and killed his clone. He was soon captured along with Daisy and was returned to Reach.

Ralph was eventually discharged from the SPARTAN-II program due to his psychological condition. After his dismissal, he was adopted by a family and lived a normal life. Although some of his gene treatments were curtailed and suppressed, there were some irreversible changes that made his appearance different from other children his own age when he assimilated into civilian life. Due to his upbringing and physiological differences, his transitional years were easier for him, though he had tendencies of bullying weaker children. However, this was viewed as a phase and not a trend.[4]

While still slightly more than baseline human,[5] Ralph enlisted in the UNSC Marine Corps and later participated in the Harvest Campaign. During an engagement with the Covenant, Daisy attempted to assist him and a group of other Marines. After being mortally wounded by Needler fire, Daisy unsuccessfully attempted to cover the Marines' retreat. Ralph and the Marines were killed by a Sangheili's shots from a Fuel Rod Gun while trying to escape in a Pelican.